A Thorny Riddle

Give us a lush green field and we'll be seen.
Against bright walls of orange - not a trace.
We often hide inside a cozy nook,
but never in deep darkness can we dwell.

Sometimes you cannot hear us but we swear
we're here, although you'll see our rough ends first,
and here, if there were eyes that would inspect
under the boughs and in unusual troughs.

The way we choose to play may make you mad
and three of us can be a wee bit much.
We know you'll grow to like our company
and when we're missed our absence is a thorn.